Страница 1 мировой engineering стандарты общая спецификация

Current 
or 
History 
DTCs stored (use $A9 service).
Procedure 3: For SPS_TYPE_C ECUs that do not have diagnostic responses enabled.
1. Send a DisableNormalCommunication functional request with data bytes after the Service Id and verify
that there is no response from the SPS_TYPE_C ECU.
2. Next, send a $A2 service request and verify that no response is sent (because a valid $28 service had not

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been received).
Procedure 4: For SPS_TYPE_B ECUs
1. Send a valid DisableNormalCommunication request and verify the correct positive response from the
SPS_TYPE_B ECU.
8.9.8 Tester Implications. 
Upon receipt of the response to this request, the test device may assume that the
link will now be quiet for at least P3
C 
ms. This mode will be terminated if a TesterPresent ($3E) message is not
received at least once every P3
C 
ms.
The tester is also responsible to send a ReturnToNormalMode ($20) request (to all nodes) if any single node
rejects the request for service $28. Otherwise, the device that rejected the $28 service would still be expecting
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GMW3110
normal communications traffic while the nodes that accepted the $28 request would quit communicating,
resulting in erroneous serial data DTCs being set.

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